Top 10 Longest Highways in the United States 2025
10.
U.S. Route 12 – 2,484 miles
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Longest Highways in the USA
9.
Interstate 40 – 2,555 miles
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Longest Highways in the USA
8.
U.S. Route 2 – 2,571 miles
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Longest Highways in the USA
7.
U.S. Route 60 – 2,670 miles
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Longest Highways in the USA
6.
Interstate 80 – 2,899 miles
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Longest Highways in the USA
5.
U.S. Route 50 – 3,011 miles
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Longest Highways in the USA
4.
Interstate 90 – 3,021 miles
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Longest Highways in the USA
3.
U.S. Route 30 – 3,073 miles
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Longest Highways in the USA
2.
U.S. Route 6 – 3,207 miles
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Longest Highways in the USA
1.
U.S. Route 20 – 3,365 miles
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Longest Highways in the USA